Tamron 135mm f/2.8
Photos| Problem | Reason | Fix |
|---|---|---|
| Always max aperture. |
Weak spring in blade mechanism.
 |
I changed new spring. |
| Works only in manual mode. |
Strong spring in blade mechanism, weak spring in automatic pin.  |
Not fixed yet. |
Helpful information
| Source | |
|---|---|
Tamron carefully assembled these lenses using a brown colored type of adhesive (possibly ThreeBond, but it could have been a thinned contact cement) to secure all screws. |
Model JSG-28Au Adapt-A-Matic Lens Index |
| Small springs can be found in relays and solenoids. | kaje.nukku.net |
It's me behind the page: kaje at iki.fi